--  @testpoint:opengauss关键字repeatable(非保留)，作为函数名

--关键字不带引号-成功
drop function if exists repeatable;
create function repeatable(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function repeatable;
--关键字带双引号-成功
drop function if exists "repeatable";
create function "repeatable"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "repeatable";
--关键字带单引号-合理报错
drop function if exists 'repeatable';
create function 'repeatable'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `repeatable`;
create function `repeatable`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/